Jiayuan Technology recently stated on an investor interaction platform that it has achieved commercial progress in the field of copper foil for solid-state batteries, and currently its related products have been matched with the supply of five top-tier battery enterprises.
According to reports, Jiayuan Technology's copper foil products for solid-state batteries can be used not only in new energy vehicles but also in low-altitude economy scenarios. For example, solid-state batteries using its high-temperature-resistant copper foil have been installed on eVTOLs (electric vertical takeoff and landing aircraft) released by top-tier producers for testing.
On the technical front, data shows that Jiayuan Technology launched high-specific-surface-area boundary-expanding copper foil in 2024 to address the insufficient contact area and interface impedance bottlenecks at the solid-solid interface of the anode current collector in solid-state batteries. It also introduced special alloy copper foil to alleviate structural instability and interface failure issues of the anode current collector in high-energy-density solid-state batteries under high-temperature and high-voltage conditions. In 2025, it launched double-sided nickel-plated copper foil to solve the problems of poor high-temperature and corrosion resistance of the anode current collector in solid-state batteries.
In terms of capacity expansion, recently, the first phase of Workshop No. 3 of the Jiayuan Times project, a joint venture between Jiayuan Technology and CATL for the annual production of 100,000 mt of high-performance copper foil, has entered the production stage with its first copper foil production line with an annual capacity of 12,500 mt. Installation work for the second production line with an annual capacity of 12,500 mt is also progressing simultaneously.
As one of the core materials for next-generation battery technology, the field of copper foil for solid-state batteries is accelerating technological breakthroughs and commercial applications. Not only Jiayuan Technology, but also leading material enterprises such as Nord Corporation, Tongguan Copper Foil, and AMTech are actively deploying in this field. These enterprises are driving continuous breakthroughs in key indicators such as interface impedance, high-temperature stability, and corrosion resistance of lithium battery copper foil and composite copper foil through ongoing technological innovation, thereby providing important support for the industrialisation of solid-state batteries.
